Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Division of Fractions.

No description
by

Mr Mattock

on 9 May 2016

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Division of Fractions.

Division of Fractions.
Starter
Dividing a fraction
What is

2
L.O. - To divide one fraction by another
fraction using a reciprocal.

How many eighths would
it take to make up the
shaded fraction?

Use this to explain the
answer to
3 1
4 8
/ 5 =
3
What about
7
/ 9 =
8
Dividing a fraction by a fraction
5 3
6 4
Dividing a fraction by a fraction
5 3
6 4
"To divide by a fraction, multiply by its reciprocal".
Reciprocals
Find reciprocals of these numbers (I suggest working across)
Examples of Division
Further Examples
Main Activity 1
Red
Amber
Green
Answers
Red
Amber
Green
Reciprocals
Find reciprocals of these numbers (I suggest working across)
Starter
How many eighths would
it take to make up the
shaded fraction?
6

Use this to explain the
answer to
3 1
4 8
= 6
Dividing a fraction
What is

2
/ 5 =
3
What about
7
/ 9 =
8
2 1 2
3 5 15
x =
7 1 7
8 9 72
x =
Reciprocals
Reciprocals
7

1
6

3
8
1
4
5
Reciprocals
7

1
6

3
8
1
4
5
5 4
6 3
= x = = = 1
20 10 1
18 9 9
4 5 2 5
6 3 3 3
or = x = x
Examples of Division
5 72 72 5 6 1
12 65 12 65 1 13
= x = x = x
6
13
=
14 39 39 14 13 1
3 28 3 28 1 2
= x = x = x
13 1
2 2
6
= =
Further Examples
36 21 21 36 3 9
77 16 77 16 11 4
27
44
21 44 44 21 11 3
4 35 4 35 1 5
33 3
5 5
= x = x = x
= x = x = x
=
= = 6
Activities
Key
Examples

Activity
Answers

Worked
Example

Worked
Example

Worked
Example

Worked
Example

Worked
Example

Reciprocals
The reciprocal of a number is the value
that multiplies with the original number
to give 1 i.e.

x = = 1
b
a
a
b
ab
ab
A quick way of recognising a reciprocal
is to flip a fraction upside down i.e.
a
b
The reciprocal of is .
b
a
To divide by a fraction, multiply by its
reciprocal.
Full transcript